Abstract

An alternative method for tissue harmonic imaging is proposed. An adaptive filter (AF) is applied for each receiving RF signal acquired by the ultrasonic(US)transducer array. The technique uses single transmit pulse but cancels out the fundamental frequency (FF) of the received signal by appropriately changing the delay terms of the AF’s. The resultant signal is slightly improved at second harmonic frequency. The M‐tap‐delay AF processing can be illustrated for N‐element transducer array as below: